Balancing Chemical Equations

The video tutorial demonstrates how to balance the chemical equation for MgO plus Si. It begins by counting the atoms of magnesium, oxygen, and silicon. The instructor explains the need to balance the oxygen atoms first by adding a coefficient of 2 in front of MgO, which also affects the magnesium atoms. Then, the magnesium atoms are balanced by adding a coefficient of 2 in front of Mg. The video concludes with the balanced equation: MgO plus Si yields Mg plus SiO2.

What is the initial count of silicon atoms in the equation MgO + Si?

• Two

• Four

• One

• Three

What is the first step taken to balance the equation?

• Add a coefficient to Si

• Add a coefficient to MgO

• Add a coefficient to Mg

• Add a coefficient to SiO2

How many oxygen atoms are there after balancing with a coefficient in front of MgO?

• One

• Two

• Four

• Three

What is the next step after balancing the oxygen atoms?

• Balance the silicon atoms

• Balance the magnesium atoms

• Balance the entire equation

• No further steps are needed

What coefficient is added in front of Mg to balance the magnesium atoms?

• One

• Three

• Four

• Two

What is the final balanced equation for MgO + Si?

• 2MgO + Si → 2Mg + SiO2

• MgO + Si → Mg + SiO2

• MgO + 2Si → Mg + SiO2

• 2MgO + 2Si → Mg + 2SiO2